This PR was squashed before being merged into the 5.3-dev branch.Discussion----------[Config] Use plural name on array values| Q             | A| ------------- | ---| Branch?       | 5.x| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       || License       | MIT| Doc PR        | Related:symfony/symfony-docs#15264If we have a PrototypedArrayNode and the prototype is does not have a key (`->useAttributeAsKey('name')`). Then we know for sure that the value should be an array.See this example from `$framework->assets()````diff    /**+    *@param list<mixed>     *@return $this     */-   public function baseUrl($value): self+   public function baseUrls(array $value): self    {        $this->baseUrls = $value;        return $this;    }```Commits-------f564a7a [Config] Use plural name on array values